<h4>Optional Tags</h4>

<p>
  By default, you set a number of tags (and if you want, a selection of specific tags) that people can use in their 
  requests -- for example, maybe you allow people to request a fandom and two characters. You don't want to 
  offer too many, because that will make it harder to match people up, especially if you promise an exact match
  on all the tags (you can of course also just promise as good a match as possible).
</p>

<p>
  Optional tags are useful if you want to try and let your challenge members match up on more detailed or obscure requests,
  but want to ensure you can match without too much pain. They add an extra option to the signup page: the person signing up
  can put any canonical tags they want, of any kind, into the optional box. The matching process will try to match
  people on these optional tags, but if it can't, it will fall back to the basic tags. 
</p>
